Staking tool



April 1945- R. c. MORGAN 2,372,973

STAKING TOOL Filed Dec. 15, 1943 FIGURE I.

IN VEN TOR.

ROBERT CLARKE MORGAN Patented Apr. 3, 1945 2,372,973 STAKING 'roor.

Robert-Clarke Morgan, Omaha, Nebr., assignor to The Glenn L. Martin Company, Middle River, Md., a corporation of Maryland Application December 15, 1943, Serial No. 514,357

4 Claims.

This invention relates to a power driven, portable staking tool. a

It is often necessary to perform staking operations in hard-to-get-at places or in material that is sufiiciently hard so that a power tool is preferable to a hand tool to accomplish the above and other desirable results.

The tool forming this invention is so constructed that it is quickly and easily attached to a conventional portable pneumatic hammer of the percussion type which is generally used for riveting.

Another object of the invention is the provision of a structure which is simple to fabricate and attach to a conventional pneumatic gun.

A further object of the invention is the provision of a power-operated, staking tool which can be used to stake metal in places relatively inaccessible with ordinary means.

Further and other objectswill become apparent from the decsription of the accompanying drawing which forms a part of this disclosure and in which like numerals refer to like parts.

In the drawing:

Figure l is a side elevational view of the invention attached to a pneumatic hammer.

Figure 2 is a perspective view, partly in section, showing details of the device.

Figure 3 is a further perspective view, partly in section, showing other details.

Figure 1 of the drawing shows the conventional pneumatic percussion type hammer generally indicated as I, having a cylindrical housing or barrel portion 2 from which percussion member or hammer 3 extends. to the mechanism of the gun which is admitted through air hose connection 5.

The attachment for the gun consists of a bracket comprising supports 6 secured to housing 2 by clamp 1 so that it extends longitudinally of the housing substantially parallel to the percussion member. Bolts 8 are adapted to quickly secure supports 6 to clamp 1 around the housing portion of the gun, in the operative position. At the outer end of supports 6, arocker 9 in the form of a bell crank is pivoted about a pin It so thatv it moves in the plane of the percussion member. One arm H of the bell crank or rocker member has a staking point 12 removably secured therein adjacent the outer end by means of set screw 13. This arm forms an extension of supports 6. The other arm Id of rocker member 9 is substantially at right angles to the arm carrying the staking member and is maintained in contact with the percussion member by means of spring l5.

Trigger 4 controls the air Spring I5 is supported on pins 16 and bolt 8 between members 6 and adapted to engage an extension ll of the rocker arm to hold the rocker firmly against the percussion member.

For speed and accuracy in staking a hard metal or efiecting a staking operation in a place Where there is not sumcient clearance for a hand tool, this staking tool may be attached to any conventional percussion hammer by means of clamp 1. This clamp is so adiusted that the end of the percussion member engages arm M which, under the tension of spring I5, is held securely against the percussion member. It can readily be seen from the illustrations that upon operation of the hammer, the impact or motion of the percussion member will be transmitted from arm Hi to arm II and the stake secured therein will be actuated by the same impact of the percussion member transmitted through the rocker arm. Spring I5 is relatively heavy and of such tension to hold the arm 14 against the percussion member to prevent chatter and insure pivotal motion around pin In.

It is to be understood that certain changes, a1- terations, modifications and substitutions can be made without departing from the spirit and scope of the appended claims.

I claim as my invention:

1. A staking tool attachment for a portable,

percussion type hammer having a housing and a percussion member extending therefrom, said attachment comprising a support adapted to be secured on said housing, extending substantially parallel to said percussion member, a bell-crank member pivotally mounted on said support, having one arm in which a staking point is secured, extending substantially parallel with said percussion member and another arm extending substantially normal to, and in contact with, the end of said percussion member, and a spring means for holding said bell-crank member against said percussion member to insure pivotal motion of said rocker arm.

2. A staking tool attachment for a portable, percussion type hammer having a housing and a percussion member ext-ending therefrom, said attachment comprising a support extending longitudinally of said housing substantially parallel to said percussion member, clamp means for removably securing said support on said housing, a

of said percussion member and another arm having mounted therein adjacent the end thereof, a

staking point, and means urging said bell-crank against said percussion member.

3. A staking tool attachment for a portable, percussion type hammer having a housing and a percussion member extending therefrom, said attachment comprising a support extending longitudinally of said housing substantially parallel to said percussion member, clamp means for removably securing said support on said housing, a bell-crank pivotally mounted on said support, said bell-crank having one arm extending substantially normal to, and in contact with, the end of said percussion. member and another arm having mounted therein adjacent the end thereof, a staking point, whereby when the percussion member actuates one arm of said bell-crank, a staking operation may be effected by said point mounted in said other arm, and spring means to maintain said bell-crank in firm contact with said percussion member.

4. A staking tool attachment for a portable percussion type hammer having a housing and a percussion member extending therefrom, said attachment comprising a bracket secured on said housing, a rocker member supported on said bracket whereby one arm of said rocker member is normally parallel to said percussion member and whereby the other arm of said rocker membar is in contact with the end of said percussion member, a staking tool carried by said normally parallel arm, and a spring means mounted on said bracket adapted to hold said rocker member in its normal position.

ROBERT CLARKE MORGAN. 

